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Stock Appreciation Rights (Tables)
 12 Months Ended
Apr. 30, 2013
SARS [Abstract]  
Stock Appreciation Rights Vesting Schedule [Table Text Block]
Number of Years the Grantee has remained
a Torotel director following the Date of Grant
Shares represented
by a SAR in which
a Grantee is Vested
Under one
—
%
At least one but less than two
33
%
At least two but less than three
67
%
Three or more
100
%
Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]
 
2013
2012
 
SARs
Under
Option
Weighted
Average
Grant
Price
SARs
Under
Option
Weighted
Average
Grant
Price
Outstanding at beginning of year
280,000

$
0.429

240,000

$
0.407

Granted
40,000

$
0.270

40,000

$
0.558

Exercised
—



—

$
—

Forfeited
—



—

$
—

Outstanding at end of year
320,000

$
0.409

280,000

$
0.429

SARs exercisable at end of year
243,300

$
0.419

210,000

$
0.439

Weighted average fair value of SARs granted during the year
 

$
0.270

 

$
0.256
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
2013
2012
Number outstanding
320,000

280,000

Range of grant prices, upper limit
$
0.695

$
0.695

Range of grant prices, lower limit
$
0.208

$
0.208

Weighted average grant price
$
0.414

$
0.429

Weighted average contractual life remaining (in years)
4.85

5.28

10-day average market price
$
0.419

$
0.270

Weighted average stock volatility
144.67
%
135.82
%
Weighted average expected life
4.44

4.86

Weighted average risk free rate
0.66
%
0.95
%
Weighted average dividend yield
—
%
—
%
Weighted average fair value price
$
0.389

$
0.278

Total vested SARs
243,300

210,000

Weighted average aggregate fair value
$
82,000

$
6,650

Weighted average aggregate intrinsic value
$
16,000

$
220

Total compensation expense (benefit)
$
135,000

$
(28,000
)
Unrecognized compensation expense related to non-vested SARs granted
$
15,000

$
9,000

Expected period to recognize compensation expense related to non-vested SARs granted (in years)
1.67

1.90

Total liability for SARs on consolidated balance sheets
$
96,000

$
52,000